3/1/2023 0 Comments Bitcoin core size![]() The general idea to solve the malleability bug by "separating" signature data from other transaction data stems back several years.Īs far back as 2012, the likes of Bitcoin Core contributors Russell O'Connor, Matt Corallo, Luke Dashjr and Gregory Maxwell, as well as Bitcointalk moderator "Theymos", discussed the issue on IRC Bitcoin development channels – but at that time they didn't see a tenable way of pulling it off on the Bitcoin network. This, in turn, makes it significantly harder to build certain second-layer protocols on top of Bitcoin, like bi-directional payment channels. However, it does complicate creating newer transactions depending on unconfirmed transactions: New transactions need to know the transaction identifier they rely on. Transactions are still valid and will move the bitcoins from the same place to the same place, under all the same conditions. This doesn't need to be a big problem in itself. The red lines roughly represent malleated transactions on the network Statistics from the 2015 malleability attack on Bitcoin. This in turn means that the appearance of the whole transaction, and more specifically the transaction identifier, can be altered by those relaying transactions over the Bitcoin network or by miners that include transactions in blocks. In what is referred to as the "malleability bug", Bitcoin signatures can be slightly altered by anyone, even after these signatures are created and without invalidating the signatures. It's this signature data that brings a slight complication with it. This contains a bit of code with cryptographic signature data, which proves that the owner of a bitcoin really did want to spend the bitcoin. That covers which bitcoins are being moved and where they are being moved to, as well as some other data. This is a look back at the long road to SegWit.īitcoin transactions consist of two main parts. ![]() As of today, all SegWit-ready nodes on the Bitcoin network are enforcing the new rules, marking Bitcoin's biggest protocol upgrade to date.īut activation did not come easy, and it did not come fast. Segregated Witness (SegWit) has activated on Bitcoin. ![]()
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